If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

What is full of holes but still holds water?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

What English word has three consecutive double letters?

In the image given, you can find several triangles. Can you count them all?

The dirtier I get, the whiter I look. Who am I?

Different lights make me strange by changing me into different sizes. What am I?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?